Problem with Aweber on My Blog (1 post)

I am trying to update my aweber form on my blog http://www.fashionistastyles.com and my aweber form is extremely too long. I contacted aweber and they are stating that there is something wrong with the CSS code on my WP blog and to contact WordPress to see how i can get it fixed.

What exactly do i need to do to get it to look the way that i set it up on Aweber since it should not appear this long?